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Shyam Sarkar, Brahmaiah Meesaragandla, Chanchal Hazra and Venkataramanan Mahalingam Sub-5 nm Ln3+-doped BaLuF5 Nanocrystals: A Platform to Realize Upconversion via Interparticle Energy Transfer (IPET) Advanced Materials 25

Article first published online: 1 NOV 2012 | DOI: 10.1002/adma.201203641

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The upconversion process is reported to occur via interparticle energy transfer (IPET) achieved with Ln3+-doped BaLuF5 (Ln = Tm and Yb) nanocrystals in the size range of sub 5 nm. Both Yb3+ and Tm3+ ions are independently doped in BaLuF5 nanocrystals. Colloidal mixtures containing the above two nanocrystals show strong upconversion emission in the blue, red, and near-IR regions via IPET.

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